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IMPACT OF METHAMIDOPHOS AND METHOMYL ON POPULATIONS OF LIRIOMYZA SPECIES (DIPTERA: AGROMYZIDAE) AND ASSOCIATED PARASITES IN CELERY

Published online by Cambridge University Press:  31 May 2012

John T. Trumble  and
Nick C. Toscano
John T. Trumble
Affiliation:
Department of Entomology, University of California, Riverside, California92521
Nick C. Toscano
Affiliation:
Cooperative Extension, University of California, Riverside, California92521
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Abstract

Methamidophos proved more suitable than methomyl for incorporation in an integrated pest management program for celery. Methomyl applications resulted in increased leaf mining and greater emergence of Liriomyza species leafminers. Methomyl use also increased adult parasite mortality, and significantly reduced the rate of parasitism by approximately 50% as compared to methamidophos or control treatments. Species composition of parasites was influenced by pesticide treatments; the Diglyphus species, Chrysocharis species and Halticoptera circulus (Walk.) demonstrated tolerance, but Chrysonotomyia punctiventris (Crawford) was intolerant.

Résumé

Le metamidophos est apparu plus convenable que le methomyl pour utilisation dans un programme de lutte intégrée en culture de céleri. Des traitements au methomyl ont augmenté le minage par les mineuses du genre Liriomyza, ainsi que leur émergence. Le methomyl a aussi augmenté la mortalité des parasites adultes et significativement réduit l'incidence de parasitisme d'environ 50 pourcent comparativement au traitement témoin et au metamidophos. La composition spécifique des parasites a été affectée par les traitements pesticides : des espèces des genres Diglyphus et Chrysocharis ainsi que Halicoptera circulus (Walk.) se sont montrés tolérantes, mais Chrysonotomyia punctiventris (Crawford) était intolérante.

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 10 , October 1983 , pp. 1415 - 1420
Copyright
Copyright © Entomological Society of Canada 1983

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